default or selected kernelversion does not have config value CONFIG_UBSAN_UNSIGNED_OVERFLOW.
Result is shown for kernelversion 5.13-rc2

Perform checking for unsigned arithmetic overflow

configname: CONFIG_UBSAN_UNSIGNED_OVERFLOW

Linux Kernel Configuration
└─>Kernel hacking
└─>Generic Kernel Debugging Instruments
└─>Undefined behaviour sanity checker
└─>Perform checking for unsigned arithmetic overflow
In linux kernel since version 5.11 (release Date: 2021-02-14)  
This option enables -fsanitize=unsigned-integer-overflow which checks
for overflow of any arithmetic operations with unsigned integers. This
currently causes x86 to fail to boot.

depends
CONFIG_UBSAN
CONFIG_cc-option
NOT CONFIG_X86_32